Tracking Protection allows you to take control of your privacy online. While Firefox has a Do Not Track feature that tells websites not to monitor your behavior, companies are not required to honor it. Firefox's Tracking Protection feature puts the control back in your hands by actively blocking domains and sites that are known to track users.

Mozilla’s mission is about advancing the Web as a platform for all. At Mozilla Research, we’re supporting this mission by experimenting with what’s next when it comes to the core technology powering the Web browser. We need to be prepared to take advantage of tomorrow’s faster, multi-core, heterogeneous computing architectures. That’s why we’ve recently begun collaborating with Samsung on an advanced technology Web browser engine called Servo.

2010

Cookie manager for Firebug. Firebug has to be installed in order to use this extension. Use this extension to create a new cookie, delete existing cookies, see list of cookies for current site, manage cookies permissions and a lot more.

Basically, Firefox is setting the line-height to “normal” on buttons and is enforcing this decision with an !important declaration. This is a frustrating decision on their part, particularly considering (as Eric Meyer has pointed out at great and detailed length), line-height: normal is anything but.

Today we’re releasing the first beta-quality version of Firefox 4, which starts us down the path to a final release of Firefox 4. We’re handling this beta differently than we’ve done other releases. In previous betas we’ve made milestone-like releases. For this beta we’ll be making more frequent updates during the beta program

We’ve decided to disable plugin (not to be confused with add-ons, which are supported) support for this release. The Adobe Flash plugin used on many sites degraded the performance of the browser to the point where it didn’t meet our standards. If you wish to enable our experimental plugin support, you will be able to manually via about:config, but do so at your own risk. We are working on an add-on that will allow the user to have control of which sites to enable plugins for, as some sites, like YouTube, do work quite well.